Improvement in permutation locks



j/jm/m/h N. PETERS. PHOTO-LITHOGRAPHER. WASMNGTON. D C.

by the direct'aetion ot'v a pin or' projection from the -mentary lock, whereby a change of' combinatioucan' f 'Figure 5 isa perspective View of my detcnt dcdanni tatt NEIL MAoNEALnoF CINCINNATI, OHIO.

Letters Patent No. 105,102, :lated July 5, 1870.

IMPROVEMENT IN PE RMUTATION Locks.A

The Schedule referred to in these Letters Patent and making part of the same I, NEIL MACNEALE, of' Cincinnati, Hamilton county, Ohio, have invented a new and useful Permutation Lock, of which the following is a specification.

' Nature and Objects of the I nventioa.

r1his is an improvement in the class of' locks which comprises a primary set of permutat-ing disks capable of being set up to any predetermined combination of letters or figures, and of being placed in gear with a series of secondary disks or tumblers, whose gated peripheries, except when placed in proper range to receive the detent, prevent anyretraction of' the main bolt, thus restricting the use of the lock to persons in possession of the selected formula; and my improve ment is especially designedv for that class of'Y single huh permutation locks whose detent vis-pivoted to and moves with the main bolt in the acts of locking and unlocking.

The first part of my invention relates to an arrangement of detcnt, which, never resting upon the gated or secondary tumblers, except when forced thereuponV primary disks, affords no opportunity of clandestine interference with the lock, by any person feeling or otherwise manipulating it from without.

lhe second part of' my invention relates to the combination with the aforesaid detent of a supplementary dskor guard-plate, which serves to close the range of gates, and toprevent any contact of the detentwith the tumblers until the final movement of opening the lock. i

The third part of my invention relates to a supplehe effected only by ouein possession of a key specially provided for disengagiug the secondary disks or tumblers from the primary or vpermutation disks.

General Description with Reference to the Drawing.

Figure 1 is a rear elevation of'a lock embodying my invention, the cap having beenv lifted, the bolts shot, and the detent being in iis normal or inactive position. A

Figure 2 is a rear elevation` of the ldetent with its accessories, said detent being depressed but not yet gated.

Figure 3 is a similarelevaton with the dete'nt gated, a portion ofl said detent being shown by dotted lines.

Figure 4 is a rear elevation, showing the. detent being returned to its normal or inactive posit-ion.

tached.-

Figure 6 shows my sliding fence detached.

Figure 7 is a partially sectionized side elevation of my sliding fence. f

Figures 8 and 9 show my guard-plate or disk, with the contiguous tumbler in two positions.

Figure 10 is a' rear view of the sliding arbor of my tumblers. n

AFigures 11, 12, and 13, are respectively a side elevation, a transverse section,.aud a perspective view oi' thc tumbler-shifting mechanism.

Figure 14 shows the head or operative end of the key for operating said mechanism..

Figure 15 is a perspective view of a modification oi my detent. y

A is the inclosing-shcll or case of my lock.

A studfshaft, B, which projectsV horizontally from the shank ofthe main bolt G, constitutes thepivot or v arbor of a rocking-plate or'dog, D, which has a preponderating weight at its rear end d, so as, whenever left at liberty, to elevate its front or operative end d.

Confined within a vertical slot, in said front end of the dog, is my sliding lfence or racking-stump E, whose horizontally-projecting arm e, resting on the periphery of the guard-plate, to be presently described, whenever the said'plate and its series of' tumblers are not completely in gate,7 causes its head e' to impinge against the fixed stump F, as in figs.- 1, 2, and 4, so as to prevent the retraction of the main bolt, but which,\wheu said plate and tumblers are properly iii range, drops into gate, so as to fall clear of said fixed stump, and to permit the main bolt to be retracted, as `in fig. 3. 1

The fixed stump F is further useful in retaining the sliding fence to the lower end ofthe slot in the'- dog, whenever the latter is elevated, as inl fig. 4.

The arm e of the sliding i'ence,'being chamf'ered along its rear lower edge, is enabled. to lescape easily stud or hub, H, through which the main arbor passes' to the driving-plate L.'

The permutation disks are geared, by means of cogsl g, in the 'usual way, to a series of customary secondary disks or tuiblers, of' whichl the outer one, I, only is shown.

The arbor or stud-shaft J of thc tumblers projects from a slidable plate, K, which is capable-of a. slight shift or' movement from left to right, or the reverse,

dial from left to right, so as to 'shoot the bolt, and make several entire revolutions, so as to scatter th tumblers.

To Change the Combination. When the main bolt is thrown fully forward, set the tumblers according to the old combination, but do not reverse to throw back the bolt.

First, take the key W and insert it as far as it will go in the hole a in the back of the lock.v .Turn half a i revolution .toward the right, so as to throw the tumtion, which, for the reason already given, may not be changed.

Third turn the key W back to its ori nal posit-ion,

v and take it ont of the hole.

The lock is now set on the new combination.

Claims.

I claim as new and of my invention- 1. The rocking dog D, pivoted on the main bolt, and resting out of contact with the gated tumblers, and being provided with a yielding fence, E, in combination with the fixed stump F, and the rotary pin `or tappet R, havinga positive action on said rocking dog, as and for the purpose set forth.

2. In combination with the detent D E, pivoted to the main bolt and arranged as specified, and the fixed stump F, the rotating pin ortappet S, for thepurpose' designated.

3. In combination with the dog D and fence E, constrncted and arranged to operate as specified in claim 1, and with the gated tumblers I, the guard-plate M, operating as and for the purposes specified.

4. The combination of the eccentric U, shaft V, spring-guard X, and sliding plate K, with the arborJ vof the tumblers, substantially as and for the purposes set forth.

In testimony of which invention I hereunto set my hand.

NEIL MAONEALE.

Witnesses:

Gno. H. KNIGHT, JAMES H. LAYMAN. 

